“The Blauberg cowled air vent was good quality plastic and colour - the only issue was the noisy one way baffle plate on windy days which I had to add a weight and pads to stop it rattling.”
“Clever with minimal back pressure and of course incorporates the blow back/wind trap. I assume the outlet area , downwards, is the same as the circular inlet are......it looks correct,
Regards Alan Fry a”
